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#ifndef __I2C
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#ifndef __I2C_H
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#define __I2C
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#define __I2C_H
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#define I2C_SLAVE_ADDRESS               0x50
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#define I2C_CMD_VERSION                 0x01
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#define I2C_CMD_READ_MAG        0x02
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#define I2C_SLAVE_ADDRESS 0x50
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#define I2C_CMD_VERSION   0x01
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struct str_I2C_Version
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{
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  u8 Hauptversion;
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  u8 Nebenversion;
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  u8 Comp;
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} __attribute__((packed));
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#define I2C_CMD_READ_HEADING    0x03
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#define I2C_CMD_WRITE_CAL       0x04
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#define I2C_CMD_WRITE_EEPROM   0x0A
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#define I2C_CMD_READ_EEPROM    0x0B
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typedef struct
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{
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struct str_I2C_EEPROM
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  u8 Major;
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{
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  u8 Adresse;
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  u8 Minor;
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  u16 Inhalt;
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  u8 Patch;
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} __attribute__((packed));
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  u8 Compatible;
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} __attribute__((packed)) I2C_Version_t;
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#define I2C_CMD_READ_MAG     0x02
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struct str_I2C_Mag
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typedef struct
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{
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{
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  u16 MagX;
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  s16 MagX;
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  u16 MagY;
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  s16 MagY;
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  u16 MagZ;
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  s16 MagZ;
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} __attribute__((packed));
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} __attribute__((packed)) I2C_Mag_t;
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#define I2C_CMD_READ_HEADING     0x03
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struct str_I2C_WriteNickRoll
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typedef struct
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{
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{
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  s16 Nick;
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  s16 Nick;
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  s16 Roll;
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  s16 Roll;
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} __attribute__((packed));
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} __attribute__((packed)) I2C_WriteAttitude_t;
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#define I2C_CMD_WRITE_CAL     0x04
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struct str_I2C_WriteCal
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typedef struct
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{
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{
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  u8 CalByte;
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  u8 CalByte;
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  u8 Dummy1;
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  u8 Dummy2;
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} __attribute__((packed));  
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struct str_I2C_Heading
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{
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  u16 Heading;
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} __attribute__((packed));
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extern u8 Tx_Idx, Rx_Idx, I2C_Direction;
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extern struct str_I2C_Heading       I2C_Heading;
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extern struct str_I2C_WriteNickRoll I2C_WriteNickRoll;
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extern struct str_I2C_Mag           I2C_Mag;
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  u8 Dummy1;
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  u8 Dummy2;
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} __attribute__((packed)) I2C_Cal_t;
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typedef struct
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{
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  s16 Heading;
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} __attribute__((packed)) I2C_Heading_t;
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typedef enum
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{
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        I2C_UNDEF,
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        I2C_IDLE,
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        I2C_TX_PROGRESS,
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        I2C_RX_PENDING,
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        I2C_RX_PROGRESS,
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        I2C_OFF
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} I2C_State_t;
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extern volatile I2C_State_t I2C_State;
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extern volatile u8 I2C_Direction;
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extern volatile u32 I2C1_Timeout;
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extern volatile I2C_Heading_t           I2C_Heading;
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extern volatile I2C_WriteAttitude_t I2C_WriteAttitude;
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extern volatile I2C_Mag_t                       I2C_Mag;
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extern struct str_I2C_EEPROM        I2C_ReadEEPROM, I2C_WriteEEPROM;
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extern volatile I2C_Version_t           MK3MAG_Version;